Microwave oven



FIG. 1 is a front perspective view of a microwave oven showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a side elevation view opposite FIG. 4;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom perspective view thereof, showing the environmental structure in broken lines.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a microwave oven, as shown and described. 